hyatt



Patented July 5, 1887..

J. W. HYATT.

APPARATUS FOR PURIFYING WATER.

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UNITED STATES PATENT Urrren.

JOHN w. l-IYATT, or NEWARK, new JERSEY.

APPARATUS FOR PURIFYING WATER.

SPECIFICATION forming part of Letters Patent No. 366,171, dated July 5,1887.

Application filed Mny27, 1886. Renewed April 19, 1887. Serial No.235,431. No model.)

To all whom it may concern:

Be it known that I, JOHN WV. HYATT', a citi zen of the United States,residing in Newark, Essex count-y, New Jersey, have invented certain newand useful Improvements in Apparatus for Feeding Coagulaut, fullydescribed and represented in the following specification and theaccompanying drawings, forming a part of the same.

The object of this invention is to supply a regulated quantity ofcoagulant to impure water in a closed conduit under pressure be forefiltration, to produce a precipitate therein for the removal of theimpurities.

Heretofore I have patented a mechanism comprising a motor actuated bythe entire current of the impure water,and a coagulantfeeding apparatusoperated by such motor, as in United States Patent No. 293,749; but inthe construct-ion shown in said patent the entire unbalanced pressure ofthe water in the main conduit was exerted within thecoagulant-receptacle, and the energy required to force the coagulatingliquid therefrom was correspondingly great.

The objectof my presentinvention is to provide a balance within thecoagulant-receptacle for .such pressure, and to thereby diminish theenergy required to force the fluid therefrom.

In the annexed drawings I have shown two constructions for effectingthis object, the means for balancing the'pressure being the same inboth, and consisting in supplying the coagula11t-feeder with water fromthe main conduit-pipe under the same pressure as the fluid to which thecoagulant is delivered. The effect of such construction is to entirelyrcmove the resistance to the movement of the coagulantfeeder, andconfines the operation of the motor wholly to the function of aregulator for determining the rate at which the coagulant is delivered.I

Figure 1 represents a filtering-plant provided with a rotary motoractuating a rotary pump to force a regulated quantity of water throughan alumtank, and thence into the main conduit, impregnated with thedesired proportion of coagulant. Fig. 2 represents a filtering-plantprovided with a rotary motor for actuating a piston feeding deviceanalogous to that shown in my United States Patent No. 293,749; and Fig.3 represents the construction of such piston feeding mechanism insection on line was in Fig. 2.

A is the filter; B, the main conduit leading the impure water theretoand passing on its way through a rotary motor, 0. After operating themotor, the main current ofthe water passes from the conduit 13 directlyto the filter.

In Fig. 1 D is the rotary pump, actuated by the motor O and suppliedwith fluid by a branch, I), from the conduit B. The pump delivers thewater in a regulated quantity by pipe c to the alunrtank E, from whenceit passes to the conduit Bthrough the pipe e, charged with the desiredproportion of coagulant,which is thereby mingled with the impure waterbefore its entrance into the filter. The so-called alum tank is notshown in detail herein, but is constructed to expose a fixed area of thealum, lime, or other coagulant material to the current of water passingthrough the tank, so that a fixed amount of the same will be dissolvedby the water and delivered therewith into the fluid in the main conduit.

A is the inlet to the filter, and A the outlet for the filtered water,while a and a are overflow-pipes used in.washing the filter.

In Figs. 2 and 3 G- is a hollow cylinder containing a piston, g, forfeeding a previously prepared solution of the coagulant, the pistonbeing moved within the cylinder by a screw, h, which is provided outsideof the cylinderhea'd with a ratohet whcel, I, actuated by the motor 0. Apawl-arm, J, is pivoted upon the screwshaft adjacent to the wheel I, andis connected by a rod, Z, with an adjustable crank, m, rotated by themotor. A pawl, 0, operated by the arm J, serves to rotate theratchet-wheel step by step when the arm J is vibrated, and the rotationof the screw thus produced operates to move the piston longitudinally inthe cylinder. The piston is provided upon one side with a packing, p,and the cylinder upon that side of the'piston is charged with a solutionof the required coagulant, which is forced from the cylinder by themovement of the piston through an outlet, 1', and pipe 1', and deliveredthereby to the conduit B.

To balance the resistance of the pressure in actuating mechanism iscorrespondingly reduced. The cylinder may be recharged inany convenientmanneras through a piper, connected with the outlet rthe piston beingretracted during such operation, which maybe effected by lifting thepawl 0 and turning the screw by the hand-crank t.

.The various pipes and connections shown herein may in practice requirecocks at various points to operate them conveniently but the same arenot shown herein, as they form no part of my invention.

Having shown the means for balancing the pressure in two different kindsof feeding devices by connecting the opposite sides of the fluid-movingagent with the main. conduitpipe, it will be readily understood how suchconnections may be applied to other feeding devices of differentconstruction.

In the drawings the fluid-connections which supply a portion of thefluid under pressure from the main conduit to the inlet and outlet ofthe coagulant-feeder are connected, respectively, with the inlet andoutlet conduit-pipes of the motor G. As the internal resistance of themotor 0 must slightly diminish the pressure in its outlet-pipe B, itisobvious that the pressure supplied from the inlet of the motor 13 isgreater than that against which the feeder operates, and must operate toassist the movements of the fluid-moving agent in the coagulant-feeder,whether the same be a moving piston, as in Fig. 3, or a rotary pumpingdevice, as at D in Fig. 1. Such an arrangement of the pipes, therefore,limits the function of the motor G or O to a merely regulating device,which determines and controls the movements of the feeding device at therequired rate.

I am aware that it is common to connect both the top and bottom of anoil-cup or other feeding-receptacle with a volume of liquid underpressure that the contents of the feedingreceptacle may be discharged bygravity into such liquid under pressure, and I disclaim such aconstruction, as my invention consists in applying the fluid-pressureagainst which the coagulant is to be fed to the opposite sides of thefeeding-piston which discharges the coagulant or precipitant from thefeeding-vessel. Such piston may be of any desired form orconstruction-as, for instance, the reciprocating plug 9, (shown in Fig.3 of my drawings,) on the fluid-moving agent in any form of rotary pumpor other feeding device, operated to propel the coagulant into theunpurified water. I do not, therefore, limit myself to any particularconstruction for the fluid-moving mechanism, provided the resistance toits movement is balanced by the means herein described.

What I claim herein, and desire to secure by Letters Patent, is

1. In an apparatus for purifying water, the combination, with a feedersupplying a coagulant or precipitant to the impure water under pressure,of separate pipes conducting a portion of the fluid under pressure tothe opposite sides of the fluid-moving piston to diminish the resistanceto its motion, substantially as herein set forth.

2. In an apparatus for purifying water, the combination, with thecoagulant-feeder and a filter-conduit, of a motor actuated by the fluidin the filter-conduit, and separate pipes con ducting a portion of thefluid under pressure in such conduit separately to the inlet and outletof the coagulant-feeder, as and for the purpose set forth.

3. In an apparatus for purifying water, the combination, with thecoagulant-feeder, of a motor actuated by the fluid in the main conduit,and separate fluid-connections uniting the inlet and the outlet of thefeeder, respectively, with the inlet and outlet conduit-pipes of themotor, substantially as herein set forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses' v JOHN IV. HYATT. Witnesses:

'Inos. S. CRANE, Cats. 0. MCBRIDE.

